if you go to downlaods and go to software .37 and .38 are under there. for .4 (Newest) you can google the download as ROR main site is under construction. .4 i will tell you has quiet a few tracks, but not as many replica monster trucks. i would start with a .37 and download the V4 Monster truck pack, when i did this i simply dropped the pack into the vehicle folder, then from there, you can download the single trucks and place them in the vehicle folder as well. this is what has worked best for me, when i first started i was having the same problem as well. and when the trucks would try to load my game would crash. hope this helps.